Final answer:
The best move in algebraic chess notation given the options would be 'Bxf7# (Bishop captures on f7, checkmate),' as it delivers a checkmate and ends the game in White's favor.
Step-by-step explanation:
The question asks to identify the best move in algebraic chess notation given that White is to move. In algebraic chess notation, every move is described by the piece moved and the square it moves to, with special symbols for capture (x), check (+), and checkmate (#). Castling is denoted by 'O-O' for kingside castling or 'O-O-O' for queenside castling.
The best move among the options given would be D) Bxf7# (Bishop captures on f7, checkmate) since it immediately ends the game with a victory for White. This move is not yielding a material advantage like B) Qxe5 (Queen captures pawn on e5) or offering a check as in C) Nf6+ (Knight to f6 check), but it delivers checkmate, which is the ultimate goal in chess. Therefore, for the password requirement outlined in the question, using 'Bxf7#' would be the correct move to include.